To make sure, OS read latest repo better run 'yum clean all' because clear all cache related to repo structure.
In mratwork-release-0.2.2, link to 'https://github.com/mustafaramadhan/kloxo/raw/rpms/release/neutral/x86_64/' already disabled. So, if you found error releated to this address that mean something trouble with your yum.
Surely, I found many issues with latest yum in Centos 6 and unfortunely we can not downgraded.
Doesn't work :/
[root@nowosci /]# rpm -qi mratwork-release
Name : mratwork-release Relocations: (not relocatable)
Version : 0.0.2 Vendor: MRatWork Repository,
http://rpms.mratwork.com/Release : 2 Build Date: pi?, 4 kwi 2014, 09:22:57
Install Date: sob, 5 kwi 2014, 18:20:42 Build Host: c532h.bigraf.com
Group : System Environment/Base Source RPM: mratwork-release-0.0.2-2.src.rpm
Size : 5206 License: AGPLV3
Signature : (none)
Packager : Mustafa Ramadhan <mustafa@bigraf.com>
URL :
http://mratwork.com/Summary : MRatwork release file and package configuration
Description :
MRatwork rpm release. This package contains yum configuration for the MRatWork RPM Repository.
[root@nowosci /]# * kloxo-mr-epel: ftp.fi.muni.cz^C [root@nowosci /]# yum update
Loaded plugins: fastestmirror, priorities, protectbase, replace
Loading mirror speeds from cached hostfile
* base: mirror-pl.kielcetechnologypark.net
* extras: mirror-pl.kielcetechnologypark.net
* mratwork-epel: nl.mirror.eurid.eu
* mratwork-ius: ius.cu.be
* updates: mirror-pl.kielcetechnologypark.net
mratwork-release-neutral-arch/primary | 224 B 00:00
https://github.com/mustafaramadhan/kloxo/raw/rpms/release/neutral/x86_64/repodata/primary.xml.gz: [Errno -1] Metadata file does not match checksum
Trying other mirror.
Error: failure: repodata/primary.xml.gz from mratwork-release-neutral-arch: [Errno 256] No more mirrors to try.